Fo rc e -S e n s e S w it c h e s
P in De s c rip t io n
/MAX456
PIN
MAX4555
—
NAME
FUNCTION
MAX4554
MAX4556
1
—
2
—
1, 2
—
NOG1
NO3, NO2
NOS1
Analog Guard Channel 1 Normally Open Terminal
Analog Signal Normally Open Terminals
—
—
Analog Sense Channel 1 Normally Open Terminal
Analog Signal Common Terminals. COM2 and COM3 are low-resis-
tance (force) switches on the MAX4555. COM1 is a low-resistance
(force) switch on the MAX4556.
2, 15*,
10*, 7
COM1, COM2
COM3, COM4
—
14*, 15, 16
3*
—
—
4
—
—
—
3*
4
NOF1*
Analog Force Channel 1 Normally Open Terminal
NC1, NC2,
NC3, NC4
Analog Signal Normally Closed Pins. NC2 and NC3 are low-resistance
(force) switches.
3, 14, 11, 6
—
4
NO1*
V-
Analog Force Signal Normally Open Terminal
Negative Analog Supply Voltage Input. Connect to GND for single-
supply operation.
Ground. Connect to digital ground. (Analog signals have no ground
reference; they are limited to V+ and V-.)
5
5
5
GND
6*
—
7
—
—
—
—
—
—
—
6*
NOF2*
NC1*
Analog Force Channel 2 Normally Open Terminal
Analog Force Signal Normally Closed Terminal
Analog Sense Channel 2 Normally Open Terminal
Analog Signal Normally Closed Terminal
—
NOS2
—
8
7, 8
—
NC2, NC3
NOG2
EN
Analog Guard Channel 2 Normally Open Terminal
Enable Logic-Level Digital Input. Connect to GND to enable all switches.
9
—
IN1, IN2,
IN3, IN4
11, 10
12
1, 16, 9, 8
9, 10, 11
12
Logic-Level Digital Inputs. See Truth Tables.
Logic-Level Positive Supply Input. Connect to logic (+5V) supply. Can
be connected to V+ for single-supply operation.
12
13
VL
V+
Positive Analog Supply Voltage Input. Internally connected to sub-
strate.
13
13
14*
15
—
—
—
—
—
—
COMF*
COMS
COMG
Analog Force Channel Common Terminal
Analog Sense Channel Common Terminal
Analog Guard Channel Common Terminal
16
* Indicates high-current, low-resistance (force) switch terminal.
Note: NO_, NC_, and COM_ pins are identical and interchangeable. Any may be considered as an input or output; signals pass
equally well in either direction.
______________________________________________________________________________________ 13
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
